GB/T 34641-2017Non-destructive testing—Test method for determining image quality in direct thermal neutron radiographic examination (English PDF)
无损检测 直接热中子照相检测的像质测定方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 29, 2017
Implementation date
April 1, 2018
Scope
GB/T 34641-2017 is the English-translated version of 无损检测 直接热中子照相检测的像质测定方法.
GB/T 34641-2017 is the Chinese standard "Non-destructive testing—Test method for determining image quality in direct thermal neutron radiographic examination".
Its scope clause reads: This standard specifies the direct thermal neutron photographic detection of quality measurement methods, including the method summary, significance and purpose, the basis of application, testing Process, image quality level, determination of exposure composition, direct thermal neutron imaging process control, recording and accuracy.
This standard applies to the use of image quality film photographic images of direct thermal neutron photographic equipment, photo quality and performance rating.
NOTE The purpose of this standard is not to address the safety issues associated with its use. Users of this standard have the responsibility to develop the appropriate safety protection before use Methods, and determine the scope of application of the regulations. Its clauses include terms and definitions.
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Document preview — GB/T 34641-2017
National Standard of the People's Republic of China
- ICS
- 19.100
- Classification
- J 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 3.1 Image quality indicator; IQI
- 3.2 Beam purity indicator beampurityindicator; BPI
1 Scope
This standard specifies the direct thermal neutron photographic detection of quality measurement methods, including the method summary, significance and purpose, the basis of application, testing
Process, image quality level, determination of exposure composition, direct thermal neutron imaging process control, recording and accuracy.
This standard applies to the use of image quality film photographic images of direct thermal neutron photographic equipment, photo quality and performance rating.
NOTE The purpose of this standard is not to address the safety issues associated with its use. Users of this standard have the responsibility to develop the appropriate safety protection before use
Methods, and determine the scope of application of the regulations.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 12604.8 Non-destructive testing term neutron detection
Nondestructive testing - Determination of L/D ratio of neutron beams by thermal neutron imaging GB/T Non-destructive testing - Thermal neutron radiographic testing General and basic rules
3 Terms and definitions
GB/T 12604.8 defined and the following terms and definitions apply to this document.
3.1 Image quality indicator; IQI
A combination of devices or devices whose images on a neutron radiograph can provide visualization of the quality of the neutron radiographic images
Or quantitative information, or both.
Note. This standard includes beam purity indicator and sensitivity indicator two quality indicators.
3.2 Beam purity indicator beampurityindicator; BPI
For quantitative evaluation of neutron beam quality, polytetrafluoroethylene block as the base, embedded two boron nitride wafer, two lead wafer and two cadmium
Great device. see picture 1.
3.3
Sensitivity indicator;
Visual sensitivity for quantitative determination of visible detail on neutron radiographic images, consisting of a step wedge containing gaps and holes of known dimensions
Device. See Figure 2.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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